MLB to expand electronic strike zone to all Triple-A ballparks

Robot Umps Soon? MLB Testing Automated Strike Zone In Triple-A Games

Robot Umpires Strike Zone: It's Not as Simple as You ThinkBaseball Prospectus

Strike zone - Wikipedia

Humans are out! Hawk-eye robo ump, a new strike-calling system, will debut this week at Harbor Park. – The Virginian-Pilot

MLB tests automatic Ball-Strike system

Changes forthcoming as MLB takes logical step towards automated strike zones

Four simple changes could help speed up, increase scoring in baseball - Global Sport Matters

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Robo-umpiring has arrived in the minor leagues. Here's how it's been working. - The Boston Globe

St. Paul Saints slugger Matt Wallner welcomes his robo-ump overlords – Twin Cities

Can you still yell at robot umpires? Future of baseball getting mixed reviews in minors

Developing MLB's Automated Ball/Strike System (ABS), by Matthew Whitrock

MLB to expand electronic strike zone to all Triple-A ballparks

Has baseball expanded the strike zone this year without changing the rules? - Quora